حدوث مرض تبقع عين الطاووس على أشجار الزيتون في الهضاب الساحلية في سورية و الكشف عن مصادر مقاومة في أصناف الزيتون المحلية و المستوردة

Abstract EN

The peacock spot disease caused by Spilocaea oleaginea (Cast.) Hughes fungus was most prevalent and harmful disease on olive trees in the coastal hills of Syria.

In 2007, the disease incidence on olive trees of the two common cultivars i.e.

Khda´ary and Dirmlaly in some areas of Lattakia governorate reached 100%, and 20-70%, rerspecively in 2008.

The incidence reached 100% on Duaibly cv.

in some areas of Tartous governorate in both years.

Rate of infected leaves on inspected cultivars ranged between 55–90%.

Susceptibility of rooted cuttings of 14 tested local and imported olive cultivars against the disease varied under artificial inoculation conditions in glasshouse in 2008, and the two cultivars Tirilya and Zorallena were highly resistant, whereas Kaissy and Dan cvs.

were evaluated as resistant.

Ayrouny, Zorallina and Tirilya of the total 12 tested cultivars were highly resistant or resistant to disease under natural inoculation conditions during the years 2008, 2009 and 2010; Sukary cv.

was moderately susceptible or resistant.

Among the total 61 tested olive cultivars in germplasm block of the centre for Scientific Agricultural Research in Lattakia, only the olive cv.

Canino was free from visible and latent infections under natural infection conditions during the years 2009 and 2010.

33 local and imported cultivars were highly resistant to disease, whereas 9 cultivars were resistant.